Voltage, current and resistance are related by the formula V=IR, where V is voltage in volts, I is current in amperes and R is resistance in ohms.
To be able to work out any of the three variables you need to have the remaining two. In your example you only specified the voltage. To be able to work out the current for a voltage of 6 volts you would need to also have the resistance.
Therefore, there is no answer to your question.
Yes, that is safe.
.63 ampere draw @ 7 volts
Yes, ampere will go down.
One volt is equivalent to 1 ampere.
That's like asking how many meters in a liter. Ampere and Volt are two DIFFERENT measurements. Ampere is how much electricity you are using, while volts are how much pressure the electricity is under(Think water). If you want to figure out how many amperes your appliance is using you could use this formula: P=UxI (Watt=Volt x Ampere) or U=RxI(Volt=Resistance x Ampere).
30 amps.
Ampere-hours is a battery hold-up time rating. Volts is a voltage rating. The two are not related, so the question cannot be answered as asked.
Volts; The Ampere is the unit for current in charge per second.
One ampere is equal to one watt in a system with a voltage of one volt. This relationship is defined by Ohm's Law, which states that power (in watts) is equal to current (in amperes) multiplied by voltage (in volts).
If the 12V source can deliver 100 Ampere, then yes. If it can't, then no. (remember watts / volts = amps)
Watts = Amps X Volts Grab your calculator!
It depends on the amount of amps... you have to multiply the voltage (V) with the ampere (I) to get the power (P) in watts.